[FairyKing]

For any who don't know, the dark patches that appear under many Kamen Riders' eyes are a tradition that started with Ichigo, and they're meant to symbolize tears, for the tragedy the Rider has been through and their regret at being forced to fight.

And I just noticed, Vulcan is the only Zero-One Rider without tears in his base form. Zero-One, Valkyrie and Jin all have pretty visible tears, while Horobi, Thouser, Ikazuchi, Naki and Ark-Zero's are harder to see because they blend into the rest of their masks but they are there, and Ark-One has HUGE tears (which is very fitting). But Vulcan doesn't start with any tears, and only sort-of gets them in his later forms.

I'm not sure how symbolic that's supposed to be, but I thought it was interesting.